Still need help with this! Anyone actually made this kind of improvement?
get to 2400 blitz

I'd expect this kind of topic from a new player, but not someone more experienced.
There's no trick to getting to 2400. Just keep doing what you've been doing. Improve your openings, tactics, endgames, strategy, etc.
Read books, look at GM games, go to OTB tournaments.
Hi. I’m rated around 2000-2100 approx at blitz. Anyone suggest best way to get up to 2300-2400? If I ever play anyone 2200 or above they smash me.